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Information × Registration Number 0217U003100, 0116U005021 , R & D reports Title Working out fundumental base for process of nanoporous carbon materials obtaining for supercapacitors production from brown coal (second stage) popup.stage_title Head Popov Anatoly Fedorovich, Доктор хімічних наук Registration Date 18-01-2017 Organization LM.Litvinenko Institute of Physical Organic and Coal Chemistry popup.description2 Object of research - alkali conversion of raw coal into nanoporous carbon material (NCM) being suitable for usage in supercapacitors. Goal is to ascertain relationships of NCM formation during alkali activation of brown coal and to determine their electrochemical properties. Research methods: thermogravimetry, x-ray diffraction method, NMR-, IR-spectroscopy, low temperature (77 К) adsorption of nitrogen, voltamperometry. It was developed new method of coal activation into NCM that combines heat shock and isothermic retention. This method being acceptable for obtaining of electrode materials (EM) for supercapacitors with organic electrolite. Using heat shock (800°С) instead the thermoprogrammed slow heating allows to reduce activator (КОН) amounts and to obtain NCM with surface area 1700-2000 m2/g and pore volume up to 1.0 cm3/g at relatively low KOH/coal ratios - 0.7-1.0 g/g. By x-ray diffraction method and NMR there were evaluated changes of spatial structure and paramagnetic characteristics of brown coal under alkali cations variation MOH (M=Li, Na, K, Rb, Cs) and alkali/coal ratio (0,2-1,0 g/g). By derivatography there were determined rates of thermolysys of alkali impregnated coal as well as were evaluated change of thermolysis character. Characteristics of EM samples were studied. It was stated that brown coals EM show capacity up to 100 F/g, capacity retention ~70 % (at current density 10 А/g) and by their properties they are close to industrial EM. Product Description popup.authors Кучеренко Володимир Олександрович Раєнко Геннадій Федорович Тамаркіна Юлія Володимирівна popup.nrat_date 2020-04-02 Close